Know when your site changes —
and when your customers can't log in.
Full-site change & defacement detection, synthetic login checks, and uptime monitoring — in one $20 plan.
Free plan — no credit card. 15 monitors, 5-minute checks, email alerts.
Change & defacement detection
Know the moment a page changes
Watch a single page or crawl a site through same-host links and XML sitemaps. MonitorSpider compares readable text, titles, links, forms and image content, then shows the evidence behind a change — an edited price, a replaced image, or a removed page.
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WebPage for individual pages; WebSite for bounded site crawls and sitemap discovery.
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Detect text, destination and image file changes without alerts for raw HTML tokens.
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Before/after evidence, readable diffs and image evidence linked from each change alert.
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Alerts by email, Slack, Telegram, or webhook.
Change detection is a Premium feature. It compares fetched content; JavaScript-rendered content and CSS-only appearance changes are outside coverage. Large site sweeps may span multiple checks.
Login monitoring
Your homepage being up isn't enough
A green uptime check doesn't mean anyone can actually sign in. MonitorSpider runs a real scripted login on a schedule and measures how long your post-login assets take to load — so you hear about a broken auth flow before your customers do.
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Scripted login with success/failure assertions.
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Per-element latency on the authenticated page.
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Latency thresholds with debounced alerts.
Everything else you'd expect from a monitor
Change detection and login checks sit on top of a full uptime-monitoring engine.
Uptime & HTTP(S)
Status-code and response-body checks with response-time tracking and uptime %.
DNS record watch
Get alerted when an A, MX, TXT, or any DNS record changes out from under you.
FTP / SFTP
Confirm your file servers are reachable and accepting connections.
SOCKS proxies
Health-check SOCKS4/5 proxies from our probes.
TLS certificate monitoring
Check a host and port, track certificate expiry, and set your warning window before renewal is due.
Multi-channel alerts
Email on every plan; connect Slack on Premium and route each monitor to chosen channels, alongside Telegram & webhooks. Silence alerts during maintenance while checks continue.
Server & agent metrics
Watch CPU, memory & disk from your servers — Prometheus, Nagios NCPA & Telegraf agents, with thresholds and graphs.
Public status pages
Publish a branded status page for your customers — live status and 90-day uptime, on your own slug.
Backup monitoring
Know when a backup fails, runs too long or misses its window. One backup monitor is included free, with Windows SQL Server and Linux backup scripts.
Slack activity reports
Understand activity in selected channels
View daily and hourly message activity, replies, reactions, user and channel rankings, observed huddle sessions, member lifecycle changes and sampled active/away estimates. Filter by date, timezone, user or channel, and export user summaries to CSV.
Optional local checks flag possible exposed secrets as masked findings in the dashboard and estimate written language. Message text is processed for these checks and discarded; it is not stored in the activity reports.
Control collection and privacy
Choose channels, pause collection, toggle individual signals, and configure retention. The setting labelled GDPR mode replaces names with stable pseudonyms and conceals raw user IDs in reports and exports. Internal IDs remain for linking records; this mode does not anonymize data or certify compliance.
Activity reports use a separately configured Slack activity app. New dashboard-connected workspaces start paused, with GDPR mode on and no channels selected. Presence and huddle figures reflect observed coverage, not working hours or exact attendance.
Open Slack settingsRun a lot of client sites?
MonitorSpider is built for agencies and MSPs: watch every client's site — uptime, changes, logins, certs — from one dashboard, and route alerts wherever your team already works.
- Every client site in one place
- Team invitations with operator, basic and auditor roles on Premium
- Alert routing to Slack, Telegram & webhooks
